PHP下载远程图片的3个方法

From: http://blog.csdn.net/iefreer/article/details/46930239

直接上代码

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<?php   function dlfile1($file_url, $save_to) {     $in = fopen($file_url, "rb");     $out = fopen($save_to, "wb");     while ($chunk = fread($in,8192))     {         fwrite($out, $chunk, 8192);     }     fclose($in);     fclose($out); }   function dlfile_curl($file_url, $save_to)           // 不支持https {     $ch = curl_init();     curl_setopt($ch, CURLOPT_POST, 0);     curl_setopt($ch,CURLOPT_URL, $file_url);     curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);     $file_content = curl_exec($ch);     curl_close($ch);     if(!$file_content)     {         echo "download file failed";         return;     }       $downloaded_file = fopen($save_to, 'w');     fwrite($downloaded_file, $file_content);     fclose($downloaded_file); }   function dlfile3($file_url, $save_to) {     $content = file_get_contents($file_url);     file_put_contents($save_to, $content); }     $url = "https://mp.weixin.qq.com/cgi-bin/showqrcode?ticket=gQFM8TwAAAAAAAAAAS5odHRwOi8vd2VpeGluLnFxLmNvbS9xLzAyM1lwVXBCRWNkQ20xNmV5TDFwMUQAAgSO1QdZAwQAjScA";   //$url = 'http://avatar.csdn.net/9/D/D/1_iefreer.jpg';   dlfile3($url, 'aaa.jpg');